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JavaScript Reflect get() Method

JavaScript Reflect get() Method with examples on javascript reflect methods, apply() construct(), defineProperty() method, deleteProperty(), get(), getOwnPropertyDescriptor(), getPrototypeOf(), has(), isExtensible(), ownKeys(), setPrototypeOf() etc.

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JavaScript Reflect.get() Method

The static Reflect.get() method is used to retrieve the property from an object as a function. The first argument is the object and the second argument is the property name.

Syntax:

Reflect.get(target, propertyKey[, receiver])

Parameters:

target: It is the target object on which to get the property.

propertyKey: It is the name of the key to get.

receiver: It is the value of this provided for the call to object if a getter is encountered.

Return value:

It returns the value of the property.

Exceptions:

A TypeError, if the target is not an Object.

Browser Support:

Chrome 49
Edge 12
Firefox 42
Opera 36

Example 1

const u = {p:3};
console.log( Reflect.get ( u , "p" ) === 3 );
// if property key is not found, return undefined just like obj.key
console.log( Reflect.get ( u , "h" ) === undefined ); 
console.log( Reflect.get ( u , "h" ) === 3 );

Output:

true

true

false

Example 2

const x = {p:3};
const y = Object.create (x);
// x is parent of y
console.log (
    Reflect.get ( y, "p" ) === 3
  // Reflect.get will traverse the prototype chain to find property
);

Output:

true

Example 3

const object1 = {
  x: 1,
  y: 2
};
console.log(Reflect.get(object1, 'y'));
// expected output: 1
var array1 = ['zero', 'one','Carry','marry','charry'];
console.log(Reflect.get(array1, 4));

Output:

 2
 "charry"
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